斜向水波作用於薄多孔介質牆之邊界層分析
Date Issued
2004
Date
2004
Author(s)
DOI
922611E002029
Abstract
When an incoming water wave is parallel to
a porous breakwater, there is a paradoxical
phenomenon in earlier studies such as
Dalrymple et al. (1991) and Sahoo et al. (2000)
that by following potential flow boundary
condition of normal flux continuity, the water
wave permeates completely without regarding
to how large the porosity of the breakwater is.
To remedy the above paradoxical phenomenon, a
new partial-slipping boundary condition for
potential flow is proposed based on the reason
similar to that in Beavers and Joseph (1967).
The results show that as the water wave is
parallel to a thin porous wall, the transmitted wave
side remains quiescent, i.e. the transmitted wave
side does not have wave energy ( 0 = t C ). This
reveals that the above mentioned paradoxical
phenomenon disappears in the present study.
The viscous boundary layer effect is also
investigated, which provides proper boundary
conditions on the thin porous wall for viscous
flow and gives more detailed flow information.
Subjects
oblique linear water wave
thin porous wall
partial-slipping boundary condition
boundary layer
Publisher
臺北市：國立臺灣大學土木工程學系暨研究所
Type
report
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